Loring B. Smith (November 18, 1890 – July 8, 1981) was an American vaudeville, stage, film, radio and television actor, frequently of broadly comic and gregarious characters.

He also intermittently appeared in films, playing supporting parts in 1941's Keep 'Em Flying, with Abbott and Costello and Shadow of the Thin Man, fourth in the William Powell–Myrna Loy series of Nick and Nora Charles mysteries.

Over the following twenty-six years he was seen in nine others, including a cameo in Orson Welles' 1958 Touch of Evil as the driver of a car at a police check point, usually playing his patented persona of a blustery, equivocating businessman or politician.

Based primarily in New York, Smith frequently appeared on early television programs and was a regular on a live sitcom, The Hartmans, starring the married comic actors and dancers Paul and Grace Hartman, playing supposedly "themselves" as a suburban married couple, beset by various amusing tribulations, including an obnoxious brother-in-law, portrayed by Smith.

In "The Whole Truth" he is "Honest Luther Grimbley", a city alderman ready to buy one of used car dealer's Jack Carson's less-than-adequate pieces of merchandise, intending to show his constituents that he is living up to his name by driving such an unprepossessing vehicle.